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fontsrv: allow x11 hinting and disable autohint only (#254) Some truetype fonts have good manual hinting. Ignoring hinting makes the font render badly on low resolution screens. This commit only disables the freetype autohinter, and allows hinting.
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  1 9c611279 2012-10-21 rsc #include <u.h>

  2 9c611279 2012-10-21 rsc 

  3 9c611279 2012-10-21 rsc #include <fontconfig/fontconfig.h>

  4 9c611279 2012-10-21 rsc #include <ft2build.h>

  5 9c611279 2012-10-21 rsc #include FT_FREETYPE_H

  6 9c611279 2012-10-21 rsc 

  7 9c611279 2012-10-21 rsc #include <libc.h>

  8 9c611279 2012-10-21 rsc #include <draw.h>

  9 9c611279 2012-10-21 rsc #include <memdraw.h>

 10 9c611279 2012-10-21 rsc #include "a.h"

 11 9c611279 2012-10-21 rsc 

 12 9c611279 2012-10-21 rsc static FcConfig    *fc;

 13 9c611279 2012-10-21 rsc static FT_Library  lib;

 14 9c611279 2012-10-21 rsc static int         dpi = 96;

 15 9c611279 2012-10-21 rsc 

 16 9c611279 2012-10-21 rsc void

 17 9c611279 2012-10-21 rsc loadfonts(void)

 18 9c611279 2012-10-21 rsc {

 19 9c611279 2012-10-21 rsc 	int i;

 20 9c611279 2012-10-21 rsc 	FT_Error e;

 21 9c611279 2012-10-21 rsc 	FcFontSet *sysfonts;

 22 9c611279 2012-10-21 rsc 

 23 9c611279 2012-10-21 rsc 	if(!FcInit() || (fc=FcInitLoadConfigAndFonts()) == NULL) {

 24 9c611279 2012-10-21 rsc 		fprint(2, "fontconfig initialization failed\n");

 25 9c611279 2012-10-21 rsc 		exits("fontconfig failed");

 26 9c611279 2012-10-21 rsc 	}

 27 9c611279 2012-10-21 rsc 

 28 9c611279 2012-10-21 rsc 	e = FT_Init_FreeType(&lib);

 29 9c611279 2012-10-21 rsc 	if(e) {

 30 9c611279 2012-10-21 rsc 		fprint(2, "freetype initialization failed: %d\n", e);

 31 9c611279 2012-10-21 rsc 		exits("freetype failed");

 32 9c611279 2012-10-21 rsc 	}

 33 9c611279 2012-10-21 rsc 

 34 9c611279 2012-10-21 rsc 	sysfonts = FcConfigGetFonts(fc, FcSetSystem);

 35 9c611279 2012-10-21 rsc 

 36 9c611279 2012-10-21 rsc 	xfont = emalloc9p(sysfonts->nfont*sizeof xfont[0]);

 37 9c611279 2012-10-21 rsc 	memset(xfont, 0, sysfonts->nfont*sizeof xfont[0]);

 38 9c611279 2012-10-21 rsc 	for(i=0; i<sysfonts->nfont; i++) {

 39 9c611279 2012-10-21 rsc 		FcChar8 *fullname, *fontfile;

 40 9c611279 2012-10-21 rsc 		int index;

 41 9c611279 2012-10-21 rsc 		FcPattern *pat = sysfonts->fonts[i];

 42 9c611279 2012-10-21 rsc 

 43 c82e11b2 2018-11-14 rsc 		if(FcPatternGetString(pat, FC_POSTSCRIPT_NAME, 0, &fullname) != FcResultMatch ||

 44 9c611279 2012-10-21 rsc 		   FcPatternGetString(pat, FC_FILE, 0, &fontfile) != FcResultMatch     ||

 45 9c611279 2012-10-21 rsc 		   FcPatternGetInteger(pat, FC_INDEX, 0, &index) != FcResultMatch)

 46 9c611279 2012-10-21 rsc 			continue;

 47 9c611279 2012-10-21 rsc 

 48 9c611279 2012-10-21 rsc 		xfont[nxfont].name     = strdup((char*)fullname);

 49 9c611279 2012-10-21 rsc 		xfont[nxfont].fontfile = strdup((char*)fontfile);

 50 9c611279 2012-10-21 rsc 		xfont[nxfont].index    = index;

 51 9c611279 2012-10-21 rsc 		nxfont++;

 52 9c611279 2012-10-21 rsc 	}

 53 9c611279 2012-10-21 rsc 

 54 9c611279 2012-10-21 rsc 	FcFontSetDestroy(sysfonts);

 55 9c611279 2012-10-21 rsc }

 56 9c611279 2012-10-21 rsc 

 57 9c611279 2012-10-21 rsc void

 58 9c611279 2012-10-21 rsc load(XFont *f)

 59 9c611279 2012-10-21 rsc {

 60 9c611279 2012-10-21 rsc 	FT_Face face;

 61 9c611279 2012-10-21 rsc 	FT_Error e;

 62 9c611279 2012-10-21 rsc 	FT_ULong charcode;

 63 9c611279 2012-10-21 rsc 	FT_UInt glyph_index;

 64 9c611279 2012-10-21 rsc 

 65 9c611279 2012-10-21 rsc 	if(f->loaded)

 66 9c611279 2012-10-21 rsc 		return;

 67 9c611279 2012-10-21 rsc 

 68 9c611279 2012-10-21 rsc 	e = FT_New_Face(lib, f->fontfile, f->index, &face);

 69 9c611279 2012-10-21 rsc 	if(e){

 70 9c611279 2012-10-21 rsc 		fprint(2, "load failed for %s (%s) index:%d\n", f->name, f->fontfile, f->index);

 71 9c611279 2012-10-21 rsc 		return;

 72 9c611279 2012-10-21 rsc 	}

 73 9c611279 2012-10-21 rsc 	if(!FT_IS_SCALABLE(face)) {

 74 9c611279 2012-10-21 rsc 		fprint(2, "%s is a non scalable font, skipping\n", f->name);

 75 9c611279 2012-10-21 rsc 		FT_Done_Face(face);

 76 48da9bd7 2018-10-05 0intro 		f->loaded = 1;

 77 9c611279 2012-10-21 rsc 		return;

 78 9c611279 2012-10-21 rsc 	}

 79 9c611279 2012-10-21 rsc 	f->unit = face->units_per_EM;

 80 ed959cfb 2018-11-14 rsc 	f->height = (int)((face->ascender - face->descender) * 1.35);

 81 9c611279 2012-10-21 rsc 	f->originy = face->descender; // bbox.yMin (or descender)  is negative, becase the baseline is y-coord 0

 82 9c611279 2012-10-21 rsc 

 83 9c611279 2012-10-21 rsc 	for(charcode=FT_Get_First_Char(face, &glyph_index); glyph_index != 0;

 84 9c611279 2012-10-21 rsc 		charcode=FT_Get_Next_Char(face, charcode, &glyph_index)) {

 85 9c611279 2012-10-21 rsc 

 86 775cb933 2015-08-27 rsc 		int idx = charcode/SubfontSize;

 87 9c611279 2012-10-21 rsc 

 88 9c611279 2012-10-21 rsc 		if(charcode > 0xffff)

 89 9c611279 2012-10-21 rsc 			break;

 90 9c611279 2012-10-21 rsc 

 91 9c611279 2012-10-21 rsc 		if(!f->range[idx]) {

 92 9c611279 2012-10-21 rsc 			f->range[idx] = 1;

 93 9c611279 2012-10-21 rsc 			f->nrange++;

 94 9c611279 2012-10-21 rsc 		}

 95 9c611279 2012-10-21 rsc 	}

 96 48da9bd7 2018-10-05 0intro 	// libdraw expects U+0000 to be present

 97 48da9bd7 2018-10-05 0intro 	if(!f->range[0]) {

 98 48da9bd7 2018-10-05 0intro 		f->range[0] = 1;

 99 48da9bd7 2018-10-05 0intro 		f->nrange++;

100 48da9bd7 2018-10-05 0intro 	}

101 9c611279 2012-10-21 rsc 	FT_Done_Face(face);

102 9c611279 2012-10-21 rsc 	f->loaded = 1;

103 9c611279 2012-10-21 rsc }

104 9c611279 2012-10-21 rsc 

105 9c611279 2012-10-21 rsc Memsubfont*

106 32dc15fa 2015-02-17 rsc mksubfont(XFont *xf, char *name, int lo, int hi, int size, int antialias)

107 9c611279 2012-10-21 rsc {

108 9c611279 2012-10-21 rsc 	FT_Face face;

109 9c611279 2012-10-21 rsc 	FT_Error e;

110 9c611279 2012-10-21 rsc 	Memimage *m, *mc, *m1;

111 9c611279 2012-10-21 rsc 	double pixel_size;

112 48da9bd7 2018-10-05 0intro 	int w, x, y, y0;

113 9c611279 2012-10-21 rsc 	int i;

114 9c611279 2012-10-21 rsc 	Fontchar *fc, *fc0;

115 9c611279 2012-10-21 rsc 	Memsubfont *sf;

116 63002b3e 2014-03-03 0intro 	//Point rect_points[4];

117 9c611279 2012-10-21 rsc 

118 9c611279 2012-10-21 rsc 	e = FT_New_Face(lib, xf->fontfile, xf->index, &face);

119 9c611279 2012-10-21 rsc 	if(e){

120 9c611279 2012-10-21 rsc 		fprint(2, "load failed for %s (%s) index:%d\n", xf->name, xf->fontfile, xf->index);

121 9c611279 2012-10-21 rsc 		return nil;

122 9c611279 2012-10-21 rsc 	}

123 9c611279 2012-10-21 rsc 

124 9c611279 2012-10-21 rsc 	e = FT_Set_Char_Size(face, 0, size<<6, dpi, dpi);

125 9c611279 2012-10-21 rsc 	if(e){

126 9c611279 2012-10-21 rsc 		fprint(2, "FT_Set_Char_Size failed\n");

127 9c611279 2012-10-21 rsc 		FT_Done_Face(face);

128 9c611279 2012-10-21 rsc 		return nil;

129 9c611279 2012-10-21 rsc 	}

130 9c611279 2012-10-21 rsc 

131 9c611279 2012-10-21 rsc 	pixel_size = (dpi*size)/72.0;

132 48da9bd7 2018-10-05 0intro 	w = x = (int)((face->max_advance_width) * pixel_size/xf->unit + 0.99999999);

133 9c611279 2012-10-21 rsc 	y = (int)((face->ascender - face->descender) * pixel_size/xf->unit + 0.99999999);

134 9c611279 2012-10-21 rsc 	y0 = (int)(-face->descender * pixel_size/xf->unit + 0.99999999);

135 9c611279 2012-10-21 rsc 

136 48da9bd7 2018-10-05 0intro 	m = allocmemimage(Rect(0, 0, x*(hi+1-lo)+1, y+1), antialias ? GREY8 : GREY1);

137 9c611279 2012-10-21 rsc 	if(m == nil) {

138 9c611279 2012-10-21 rsc 		FT_Done_Face(face);

139 9c611279 2012-10-21 rsc 		return nil;

140 9c611279 2012-10-21 rsc 	}

141 48da9bd7 2018-10-05 0intro 	mc = allocmemimage(Rect(0, 0, x+1, y+1), antialias ? GREY8 : GREY1);

142 9c611279 2012-10-21 rsc 	if(mc == nil) {

143 9c611279 2012-10-21 rsc 		freememimage(m);

144 9c611279 2012-10-21 rsc 		FT_Done_Face(face);

145 9c611279 2012-10-21 rsc 		return nil;

146 9c611279 2012-10-21 rsc 	}

147 9c611279 2012-10-21 rsc 	memfillcolor(m, DBlack);

148 9c611279 2012-10-21 rsc 	memfillcolor(mc, DBlack);

149 9c611279 2012-10-21 rsc 	fc = malloc((hi+2 - lo) * sizeof fc[0]);

150 9c611279 2012-10-21 rsc 	sf = malloc(sizeof *sf);

151 9c611279 2012-10-21 rsc 	if(fc == nil || sf == nil) {

152 9c611279 2012-10-21 rsc 		freememimage(m);

153 9c611279 2012-10-21 rsc 		freememimage(mc);

154 9c611279 2012-10-21 rsc 		free(fc);

155 9c611279 2012-10-21 rsc 		free(sf);

156 9c611279 2012-10-21 rsc 		FT_Done_Face(face);

157 9c611279 2012-10-21 rsc 		return nil;

158 9c611279 2012-10-21 rsc 	}

159 9c611279 2012-10-21 rsc 	fc0 = fc;

160 9c611279 2012-10-21 rsc 

161 9c611279 2012-10-21 rsc 	//rect_points[0] = mc->r.min;

162 9c611279 2012-10-21 rsc 	//rect_points[1] = Pt(mc->r.max.x, mc->r.min.y);

163 9c611279 2012-10-21 rsc 	//rect_points[2] = mc->r.max;

164 9c611279 2012-10-21 rsc 	//rect_points[3] = Pt(mc->r.min.x, mc->r.max.y);

165 9c611279 2012-10-21 rsc 

166 9c611279 2012-10-21 rsc 	x = 0;

167 9c611279 2012-10-21 rsc 	for(i=lo; i<=hi; i++, fc++) {

168 48da9bd7 2018-10-05 0intro 		int k, r;

169 9c611279 2012-10-21 rsc 		int advance;

170 9c611279 2012-10-21 rsc 

171 9c611279 2012-10-21 rsc 		memfillcolor(mc, DBlack);

172 9c611279 2012-10-21 rsc 

173 48da9bd7 2018-10-05 0intro 		fc->x = x;

174 48da9bd7 2018-10-05 0intro 		fc->top = 0;

175 48da9bd7 2018-10-05 0intro 		fc->bottom = Dy(m->r);

176 48da9bd7 2018-10-05 0intro 		e = 1;

177 48da9bd7 2018-10-05 0intro 		k = FT_Get_Char_Index(face, i);

178 48da9bd7 2018-10-05 0intro 		if(k != 0) {

179 cc48e73a 2020-01-13 rsc 			e = FT_Load_Glyph(face, k, FT_LOAD_RENDER|FT_LOAD_NO_AUTOHINT|(antialias ? 0:FT_LOAD_TARGET_MONO));

180 48da9bd7 2018-10-05 0intro 		}

181 48da9bd7 2018-10-05 0intro 		if(e || face->glyph->advance.x <= 0) {

182 48da9bd7 2018-10-05 0intro 			fc->width = 0;

183 48da9bd7 2018-10-05 0intro 			fc->left = 0;

184 48da9bd7 2018-10-05 0intro 			if(i == 0) {

185 48da9bd7 2018-10-05 0intro 				drawpjw(m, fc, x, w, y, y - y0);

186 48da9bd7 2018-10-05 0intro 				x += fc->width;

187 48da9bd7 2018-10-05 0intro 			}

188 48da9bd7 2018-10-05 0intro 			continue;

189 48da9bd7 2018-10-05 0intro 		}

190 9c611279 2012-10-21 rsc 

191 48da9bd7 2018-10-05 0intro 		FT_Bitmap *bitmap = &face->glyph->bitmap;

192 48da9bd7 2018-10-05 0intro 		uchar *base = byteaddr(mc, mc->r.min);

193 48da9bd7 2018-10-05 0intro 		advance = (face->glyph->advance.x+32) >> 6;

194 9c611279 2012-10-21 rsc 

195 48da9bd7 2018-10-05 0intro 		for(r=0; r < bitmap->rows; r++)

196 48da9bd7 2018-10-05 0intro 			memmove(base + r*mc->width*sizeof(u32int), bitmap->buffer + r*bitmap->pitch, bitmap->pitch);

197 9c611279 2012-10-21 rsc 

198 48da9bd7 2018-10-05 0intro 		memimagedraw(m, Rect(x, 0, x + advance, y), mc,

199 48da9bd7 2018-10-05 0intro 			Pt(-face->glyph->bitmap_left, -(y - y0 - face->glyph->bitmap_top)),

200 48da9bd7 2018-10-05 0intro 			memopaque, ZP, S);

201 9c611279 2012-10-21 rsc 

202 9c611279 2012-10-21 rsc 		fc->width = advance;

203 48da9bd7 2018-10-05 0intro 		fc->left = 0;

204 9c611279 2012-10-21 rsc 		x += advance;

205 9c611279 2012-10-21 rsc 

206 9c611279 2012-10-21 rsc #ifdef DEBUG_FT_BITMAP

207 9c611279 2012-10-21 rsc 		for(r=0; r < bitmap->rows; r++) {

208 9c611279 2012-10-21 rsc 			int c;

209 9c611279 2012-10-21 rsc 			uchar *span = bitmap->buffer+(r*bitmap->pitch);

210 9c611279 2012-10-21 rsc 			for(c = 0; c < bitmap->width; c++) {

211 9c611279 2012-10-21 rsc 				fprint(1, "%02x", span[c]);

212 9c611279 2012-10-21 rsc 			}

213 9c611279 2012-10-21 rsc 			fprint(1,"\n");

214 9c611279 2012-10-21 rsc 		}

215 9c611279 2012-10-21 rsc #endif

216 9c611279 2012-10-21 rsc 

217 9c611279 2012-10-21 rsc #ifdef DEBUG_9_BITMAP

218 9c611279 2012-10-21 rsc 		for(r=0; r < mc->r.max.y; r++) {

219 9c611279 2012-10-21 rsc 			int c;

220 9c611279 2012-10-21 rsc 			uchar *span = base+(r*mc->width*sizeof(u32int));

221 9c611279 2012-10-21 rsc 			for(c = 0; c < Dx(mc->r); c++) {

222 9c611279 2012-10-21 rsc 				fprint(1, "%02x", span[c]);

223 9c611279 2012-10-21 rsc 			}

224 9c611279 2012-10-21 rsc 			fprint(1,"\n");

225 9c611279 2012-10-21 rsc 		}

226 9c611279 2012-10-21 rsc #endif

227 9c611279 2012-10-21 rsc 	}

228 9c611279 2012-10-21 rsc 	fc->x = x;

229 9c611279 2012-10-21 rsc 

230 9c611279 2012-10-21 rsc 	// round up to 32-bit boundary

231 9c611279 2012-10-21 rsc 	// so that in-memory data is same

232 9c611279 2012-10-21 rsc 	// layout as in-file data.

233 48da9bd7 2018-10-05 0intro 	if(x == 0)

234 48da9bd7 2018-10-05 0intro 		x = 1;

235 48da9bd7 2018-10-05 0intro 	if(y == 0)

236 48da9bd7 2018-10-05 0intro 		y = 1;

237 9c611279 2012-10-21 rsc 	if(antialias)

238 9c611279 2012-10-21 rsc 		x += -x & 3;

239 9c611279 2012-10-21 rsc 	else

240 9c611279 2012-10-21 rsc 		x += -x & 31;

241 9c611279 2012-10-21 rsc 	m1 = allocmemimage(Rect(0, 0, x, y), antialias ? GREY8 : GREY1);

242 9c611279 2012-10-21 rsc 	memimagedraw(m1, m1->r, m, m->r.min, memopaque, ZP, S);

243 9c611279 2012-10-21 rsc 	freememimage(m);

244 a3ec102d 2018-03-27 0intro 	freememimage(mc);

245 9c611279 2012-10-21 rsc 

246 9c611279 2012-10-21 rsc 	sf->name = nil;

247 9c611279 2012-10-21 rsc 	sf->n = hi+1 - lo;

248 9c611279 2012-10-21 rsc 	sf->height = Dy(m1->r);

249 9c611279 2012-10-21 rsc 	sf->ascent = Dy(m1->r) - y0;

250 9c611279 2012-10-21 rsc 	sf->info = fc0;

251 9c611279 2012-10-21 rsc 	sf->bits = m1;

252 9c611279 2012-10-21 rsc 

253 9c611279 2012-10-21 rsc 	FT_Done_Face(face);

254 9c611279 2012-10-21 rsc 	return sf;

255 9c611279 2012-10-21 rsc }